Never before has the U.S. Government publicly accused another country of a cyber-espionage. But that’s essentially what happened Monday morning when grand jury in Pennsylvania indicted five Chinese military hackers, following a report from a Bay Area cybersecurity firm.

Crooks have already used the HeartBleed bug to break into a major corporation’s network system. While it’s unclear whether the bad guys stole anything, statistics show cybercrime is on the rise, the crooks are changing tactics, and the playing field has exploded.